path: root/test/CodeGen/PowerPC/combine_loads_from_build_pair.ll
blob: 0f8f18a17879533e15b0a8c3968861fa0590e03c (plain) (tree)

; RUN: llc -verify-machineinstrs -O0 -mcpu=g4 -mtriple=powerpc-apple-darwin8 < %s -debug -stop-after=machineverifier 2>&1 | FileCheck %s

; REQUIRES: asserts

define i64 @func1(i64 %p1, i64 %p2, i64 %p3, i64 %p4, { i64, i8* } %struct) {
; Verify that we get a combine on the build_pair, creating a LD8 load somewhere
; between "Initial selection DAG" and "Optimized lowered selection DAG".
; The target is big-endian, and stack grows towards higher addresses,
; so we expect the LD8 to load from the address used in the original HIBITS
; load.
; CHECK-LABEL: Initial selection DAG:
; CHECK-DAG:     [[LOBITS:t[0-9]+]]: i32,ch = load<LD4[FixedStack-2]>
; CHECK-DAG:     [[HIBITS:t[0-9]+]]: i32,ch = load<LD4[FixedStack-1]>
; CHECK: Combining: t{{[0-9]+}}: i64 = build_pair [[LOBITS]], [[HIBITS]]
; CHECK-NEXT: into
; CHECK-SAME: load<LD8[FixedStack-1]
; CHECK-LABEL: Optimized lowered selection DAG:
  %result = extractvalue {i64, i8* } %struct, 0
  ret i64 %result